ExceptClassConstantFilter.java revision db267bc191f906f55eaef21a27110cce2ec57fdf 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.classfile.constant.visitor;
22
23import proguard.classfile.*;
24import proguard.classfile.editor.*;
25import proguard.classfile.attribute.*;
26import proguard.classfile.attribute.annotation.*;
27import proguard.classfile.attribute.preverification.*;
28import proguard.classfile.constant.ClassConstant;
29import proguard.classfile.constant.visitor.ConstantVisitor;
30import proguard.classfile.util.SimplifiedVisitor;
31
32/**
33 * This <code>ConstantVisitor</code> delegates its visits to class constants
34 * to another given <code>ConstantVisitor</code>, except for one given class.
35 *
36 * @author Eric Lafortune
37 */
38public class ExceptClassConstantFilter
39extends      SimplifiedVisitor
40implements   ConstantVisitor
41{
42    private final String           exceptClassName;
43    private final ConstantVisitor constantVisitor;
44
45
46    /**
47     * Creates a new ClassNameFilter.
48     * @param exceptClassName the name of the class that will not be visited.
49     * @param constantVisitor the <code>ConstantVisitor</code> to which visits
50     *                        will be delegated.
51     */
52        public ExceptClassConstantFilter(String          exceptClassName,
53                                         ConstantVisitor constantVisitor)
54    {
55            this.exceptClassName = exceptClassName;
56            this.constantVisitor = constantVisitor;
57    }
58
59
60    // Implementations for ConstantVisitor.
61
62    public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
63    {
64        if (!classConstant.getName(clazz).equals(exceptClassName))
65        {
66            constantVisitor.visitClassConstant(clazz, classConstant);
67        }
68    }
69}